Abu Hurairah said; His companion came to him and said; Messenger of Allah! We have thoughts which we cannot dare talk about and we do not like that we have them or talk about them. He said:
Have you experienced that? They replied: yes. He said : that is clear faith.

حَدَّثَنَا أَحْمَدُ بْنُ يُونُسَ، حَدَّثَنَا زُهَيْرٌ، حَدَّثَنَا سُهَيْلٌ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، قَالَ جَاءَهُ نَاسٌ مِنْ أَصْحَابِهِ فَقَالُوا يَا رَسُولَ اللَّهِ نَجِدُ فِي أَنْفُسِنَا الشَّىْءَ نُعْظِمُ أَنْ نَتَكَلَّمَ بِهِ أَوِ الْكَلاَمَ بِهِ مَا نُحِبُّ أَنَّ لَنَا وَأَنَّا تَكَلَّمْنَا بِهِ . قَالَ " أَوَقَدْ وَجَدْتُمُوهُ " . قَالُوا نَعَمْ . قَالَ " ذَاكَ صَرِيحُ الإِيمَانِ " .